A thought I had last night. The design of Artificer subclasses has really focused on having your Bonus Action filled every turn, and your damage output really depends on it. However that doesn't seem to be the case with the Armorer; in Guardian mode you only need to use Defensive Field when you've been hit, and Infiltrator doesn't have anything at all. But then it hit me that all Artificers have an option for unlocking a Bonus Action attack with the Homunculus Servant infusion. In fact, that's probably the expected play mode they balanced the damage output around.
So for anyone playtesting one or just running the numbers, don't forget about the Homunculus. It's not just for Alchemists!